Great core work — with a little inner thigh thrown in.

This is my go-to abdominal exercise when I’m short on time. You’ll feel this immediately throughout your entire abdominal section, lower back, and inner thighs. Be careful not to let your back lift off of the ground or arch. If it does, then do the modifications that are shown in the video and work your way up. Enjoy!
3 sets of 10-15.